WO2020149280A1

WO2020149280A1 - Real-time processing state display device

Info

Publication number: WO2020149280A1
Application number: PCT/JP2020/000962
Authority: WO
Inventors: 憲吾山本; 貴行山内; 村上　浩二
Original assignee: 株式会社山本金属製作所
Priority date: 2019-01-15
Filing date: 2020-01-15
Publication date: 2020-07-23
Also published as: JPWO2020149280A1

Abstract

[Problem] To provide a real-time processing state display device that maps the state of a processing tool at a tip of a machine tool along a processing path. [Solution] This real-time processing state display device comprises: a measurement means which monitors, in time series, one or more items of physical quantity data from among at least the temperature, acceleration, and stress of the processing tool; a position acquisition means which reads time-series coordinates of the processing tool in operation from time information and position information of an operation control means (CNC) of the machine tool; and a mapping means which, on the basis of time-series physical quantity data from the sensor and time-series coordinate data from the position acquisition means, converts physical quantity data associated with coordinates of positions along the processing path into visualized data and displays the visualized data at positions along the processing path.

Description

Real-time machining status display

The present invention relates to a real-time machining state display device capable of visualizing in real time physical changes such as temperature and acceleration at a machining position of a tool etc. of a machine tool.

In machine tools such as machining cutting machines, it is required to evaluate the wear, fatigue, damage, and "chatter" of tools during actual machining in order to improve machining accuracy and prevent tool damage. .. However, in the past, tool evaluations have been performed by equipment manufacturers and tool manufacturers for each equipment and tool, and they are limited to those based on general evaluation criteria and academically standardized evaluation criteria. Real-time verification of the tool was not completed.

On the other hand, the applicant has developed and provided a tool holder unit for machine tools that can measure the temperature and acceleration of a rotating tool during processing, and has also developed and provided technology for predicting abnormalities such as tool damage based on the measurement results. (Patent Documents 1 to 3). This technique is advantageous in that it can detect the physical change of the tool or the like during processing in real time and can detect an abnormality by an external device (such as a personal computer) that can wirelessly communicate with the tool or the machine tool. For example, it is also possible to monitor the acceleration in the ball end mill processing and detect the occurrence of so-called "chatter" in which the processing accuracy is likely to decrease.

However, in the past, changes in the detected tool temperature, acceleration, etc. were chronological, and even if an abnormality was detected, it was difficult to know in detail which processing position it was. For example, as described above, even if the acceleration is measured and monitored during machining of the ball end mill and it is determined that the acceleration exceeds the threshold value and "chatter" has occurred, "chatter" actually occurs at any position of the machining. It was difficult to immediately understand if there was any, and it was difficult to identify the “chatter” part in the machining target when machining a complex shape. This is considered to be an obstacle to the provision of a society in which real-time measurement data such as tool temperature and acceleration are widely used in general machining sites and high-precision machining is guaranteed.

International Publication WO2015-022967 International Publication WO2016-136919 JP, 2018-54611, A

The present invention was created in view of the above circumstances, and physical changes such as temperature and acceleration in a machining tool such as a tool of a machine tool are displayed at the same time as the three-dimensional position of machining, and the physical change occurs at the actual machining position. It is an object of the present invention to provide a real-time machining status display device that visualizes the situation in real time.

To achieve the above object, the real-time processing state display device of the present invention is specifically
A real-time machining status display device for mapping the status on the machining path of a machining tool at the tip of a machine tool,
Measuring means for chronologically monitoring one or more physical quantity data of at least the temperature, acceleration or stress of the processing tool,
Position acquisition means for reading the time series coordinates of the working tool from the time information and position information of the operation control means (CNC) of the machine tool,
Based on the time-series physical quantity data from the measuring means and the time-series coordinate data from the position acquisition means, the physical quantity data at the coordinates on the processing path are converted into visualization data and displayed at the position on the processing path. Mapping means for

According to the real-time machining status display device of the present invention, changes in temperature, acceleration and stress of the machining tool used in the machine tool can be mapped and visualized on the machining path. Specifically, the temperature, acceleration, and stress of the machining tool are monitored in real time, and the measurement data output in time series is displayed on the axis of the machining tool position/time based on the control numerical information (CNC) of the machine tool. It is converted into data, and the status of the processing tool at each coordinate is plotted by color change etc. and mapped. As a result, it becomes possible to easily understand where in the three-dimensional coordinates the state change of the processing tool, which has been difficult to understand at first glance as a change in the measured value in a predetermined time, occurs. For example, when so-called "vibration" occurs in the ball end mill machining as described above, the acceleration of the machining tool increases, and as with the machining of complicated shapes, the problem of machining precision deterioration and tool breakage due to "chatter" becomes more serious. Advantageously, the use of this apparatus makes it possible to identify at a certain position on the processing path where "chatter" has occurred, which is advantageous.

Further, it is preferable that the mapping unit converts the physical quantity data into a color designation value set in advance corresponding to a predetermined numerical value of the physical quantity data and displays the color designation value on a pixel corresponding to the coordinate data. ..

Specifically, the mapping means presets a color designation value (RGB value) corresponding to a predetermined measurement value of temperature, acceleration, or stress, and sets a color designation value corresponding to the actual measurement value on the display screen. It is displayed on the pixel indicating the three-dimensional coordinates of the processing tool.

Further, as an example of the present real-time machining state display device, the measuring means has a thermocouple inserted in the machining tool, and a temperature measuring unit that outputs information from the thermocouple as temperature data,
When the time-series coordinate data from the position acquisition means is coordinate data in the three-dimensional XYZ directions, and the mapping means displays temperature data in the XY plane, the XZ plane, and the YZ plane based on the coordinate data. Or
The measuring means includes an acceleration sensor arranged in a machine tool or a tool holder gripped by the machine tool, and an acceleration measuring unit that outputs information from the acceleration sensor as acceleration data,
When the time-series coordinate data from the position acquisition means is coordinate data in the three-dimensional XYZ directions, and the mapping means displays temperature data in the XY plane, the XZ plane, and the YZ plane based on the coordinate data. , There is.

As an actual display example, data obtained by inserting a thermocouple into the machining tool and measuring the temperature, and measuring data by an acceleration sensor mounted on a tool holder that is connected to the spindle of the machine tool and holds the machining tool are used. , XY plane view, XZ plane view and YZ plane view are preferable because all three-dimensional positions of the processing tool and the measured values of temperature and acceleration can be visualized on one display screen.

Further, the machine tool is a rotary tool that rotates the machining tool to machine the workpiece, and the acceleration sensor is located on a horizontal plane in the tool holder at a position symmetrical in the radial direction with respect to the center of the rotation axis of the rotary tool. There is also a case where it is composed of a pair of acceleration sensors arranged in a pair, and a pair of acceleration sensors arranged in a position having a phase difference of approximately 90°.

According to the present real-time machining state display device, since it is possible to detect acceleration in the horizontal direction and the rotational direction, for example, abnormal vibration during cutting can be understood at a glance at the position and measurement value on the machining path, and the machining accuracy can be improved. It is possible to visualize the cause of a large decrease in the so-called "chatter", which is a precursor of tool damage, and the occurrence of stick-slip phenomenon during tapping. In addition, it is possible to search for optimum machining conditions such as the rotation speed, feed rate, and depth of cut of the machining tool, and at the same time achieve and contradict the contradictory phenomenon of speeding up the machining process and safety (prevention of tool breakage). be able to.

Further, the mapping means displays at least the temperature data or acceleration data in the XY plane in the XY plane display window, displays the temperature data or acceleration data in the XZ plane in the XZ plane display window, and displays the temperature data in the YZ plane. Alternatively, it is preferable that the acceleration data is displayed in the YZ plane display window, and the preset color designation value corresponding to each numerical value of the temperature data or the acceleration data is displayed in the color conversion table window.

According to this real-time processing state display device, temperature measurement data and acceleration measurement data can be displayed in XY plane view, XZ plane view point and YZ plane view on one display screen, and at the same time, the measured value of the plotted color. Is advantageous because it can be visualized as to whether or not it is close to the limit.

Further, in another real-time machining state display device of the present invention, a machine tool from a measuring means included in a machine tool for measuring physical quantity data of one or more of temperature, acceleration or stress of a machining tool and an operation state of the machine tool. Measuring means for monitoring the measurement data in time series, the time series physical quantity data from the measuring means and the measurement data from the machine tool, or time-dependent changes of both data are displayed on the same time axis.

According to this real-time machining status display device, in addition to measurement data of temperature, acceleration, and stress of machining tools, measurement data of machine tools such as servo motors, acceleration pickups, dynamometers, and displacement meters can be displayed on the same time axis time chart. By displaying in real time, the accuracy of processing abnormality detection can be improved.

Furthermore, another embodiment of the present invention provides a real-time machining status display device for displaying the status change on the machining path of the machining tool at the tip of the machine tool. This real-time machining state display device measures and stores one or more physical quantity data of temperature, acceleration, or stress of a machining tool at a reference time point, and uses the time information and the position information of the operation control means of the machine tool to indicate that the machine is operating. A reference data creating means for creating reference data by reading the time-series coordinates of the processing tool, and a physical quantity data measured and saved by the reference data creating means at the time when a predetermined time has elapsed from the reference time. Comparing data creating means for creating comparative data by reading the time series coordinates of the working tool from the time information and position information of the operation controlling means, the reference data creating means, and the comparative data creating means. Based on the time series coordinates of the processing tool, the comparison calculation means for calculating the difference between the physical quantity data at the time series coordinates of the processing tool read from and the difference between the physical quantity data calculated by the comparison calculation means. Display means for displaying the coordinates on the path.

With this real-time machining status display device, it is possible to quantitatively evaluate changes over time, deterioration, and abnormalities of machining tools, machine tools, and their parts, reduce the frequency of defective products, improve machining dimensional accuracy, It is possible to improve the quality of the processed surface of the workpiece.

According to the real-time machining status display device of the present invention, with respect to changes in physical quantities such as temperature and acceleration in a machining tool such as a tool of a machine tool, the three-dimensional coordinates of the machining position and the physical quantities such as temperature and acceleration are simultaneously displayed, and actually displayed. By displaying the situation occurring at the machining position in real time, the abnormality detection location and its physical quantity can be visualized even in the case of complex shape machining.

It is a schematic diagram showing a relation between acceleration and "chatter" in machining in a machine tool, a conventional measurement data, and an image of data displayed by a real-time machining state display device of the present invention. (A) is a conventional display result image of the acceleration of the machining tool by monitoring the acceleration etc. of the machining tool of FIG. 1, and (b) is a display result image of the acceleration of the machining tool in the real-time machining state display device. .. (A) shows an example of a screen that measures and displays the acceleration and temperature in real time when the actual workpiece is cut by the processing tool with this real-time processing status display device, and (b) shows the actual cutting. A plan view photograph of an example of a workpiece being processed is shown. The concrete example 1 of a processing flow in this real-time processing state display device is shown. The concrete example 2 of a process flow in this real-time processing state display device is shown. The concrete example 3 of a process flow in this real-time processing state display device is shown. The concrete example 4 of a process flow in this real-time processing state display device is shown.

A concrete processing flow example of the configuration of the real-time machining status display device of the present invention described above will be described.

Fig. 1 is a conceptual diagram that schematically shows "chatter" during machining of a ball end mill used for milling as an example of a machining tool. The ball end mill 1 is provided with a spherical cutting blade at its tip and is mounted on a spindle of a machining center as a processing device. FIG. 1 shows the state of the ball end mill 1 at each of the positions (a) to (d) when the workpiece 2 to be cut by the ball end mill 1 has undulations in the vertical direction. In the present real-time processing state display device, the ball end mill 1 can monitor the acceleration and temperature at the cutting edge at the tip in real time, but the acceleration monitoring will be described below by focusing on the “chatter” detection.

In FIG. 1(a), the tip (cutting edge) 1a of the ball end mill 1 is in contact with a high position 2a on the surface of the workpiece 2, and this position is assumed to be the machining start position. When the ball end mill 1 moves rightward with respect to the work piece 2 while cutting from there, the height of the work piece 2 becomes lower, and at the position (b), the height of the ball end mill is lower than that of the lower position 2b of the work piece 2. The tip 1a is floated in the height direction, and the right side is pressed while being pressed by the workpiece to be cut. At this time, the acceleration of the ball end mill 1 increases, and a large "chatter" occurs as shown by the arrow in (b). After that, the ball end mill 1 further moves to the right, and the height of the workpiece 2 increases. At the position (c), when the tip 1a of the ball end mill comes into contact with the surface of the high position 2c of the workpiece 2, the acceleration becomes small and the "chatter" disappears. Further, when the tip 1a of the ball end mill moves to the right and rises to a height slightly lower than the position (b), the acceleration of the ball end mill 1 is again about the middle of the acceleration at the positions (b) to (c). It becomes large, and a moderate amount of "chatter" occurs as shown by the arrow in (d).

Fig. 2 exemplifies the conventional display result of the acceleration monitored by the ball end mill 1 of Fig. 1 and the display result of this real-time machining status display device. FIG. 2A shows the display result of the conventional method, in which the time axis (time [s]) is the horizontal axis and the acceleration [m/s2] at each time is the vertical axis. In the example of FIG. 2(a), for example, at the position of (b), the acceleration is the same as at the position of FIG. 1(b), and at the position of (c), the acceleration is small like at the position of FIG. 1(c). , (C), the acceleration increases again as in the position shown in FIG. 1(d). In the case of the display method of FIG. 2A, there is a problem that it is difficult to grasp at a glance because the position where the acceleration is large and “chatter” occurs (b) is not visualized at which position on the workpiece 2. is there.

On the other hand, FIG. 2B is a display result example in the real-time machining state display device of the present invention, in which the horizontal position of the cutting edge 1a of the ball end mill 1 (the position in the X direction ([mm]) is taken as the horizontal axis). The vertical position is the position of the cutting edge 1a of the ball end mill 1 in the height direction (the position in the Z direction ([mm]). Also, a lookup table (Look-up table) shown in the upper right of FIG. In 4, the magnitude of acceleration is displayed in color, and the color changes stepwise from the color at the left end (min.) to the color at the right end (max.). Further, the acceleration display 3 in the figure shows the machining path (trajectory) of the position of the cutting edge 1a of the ball end mill 1 in the XZ direction, at the position on the machining path. The acceleration is displayed in a color corresponding to the above-mentioned lookup table 4. For example, in the position (b) of Fig. 2, the maximum is the same as the position (b) of Fig. 1 and the position (b) of Fig. 2(a). 2 is measured, and a color corresponding to the acceleration is displayed (plotted) on the acceleration display 3. Therefore, in the case of the display of FIG. It is possible to visualize in real time that "chatter" has occurred on the cutting edge 1a of Fig. 2. In the example of Fig. 2B, the acceleration at the position in the XZ direction is visualized. It is also possible to display the acceleration at the position in the XY direction or the position in the YZ direction, or to display these at the same time.

Next, in FIG. 3, (a) shows a screen example in which the real-time machining state display device measures and displays the acceleration/temperature in real time when the actual workpiece 2 is cut by the ball end mill 1. , (B) are plan view photographs of an example of the workpiece 2 that is actually cut. In this cutting example, as shown in FIG. 2B, the workpiece 2 which is a stainless steel thick plate is cut into a concave star shape. In the screen example of Fig. 3(a), the upper row shows the translational acceleration (ACCX) in the X direction of the cutting edge 1a of the ball end mill 1, the rotational acceleration around the axis (ACCR), and the temperature (TEMP) in order from the left. The measured values at this display point are 4.780 (mm/S2), 447.609 (rθ/S2), and 6698.640 (C°), respectively. Further, in the middle row, the vertical axis is the X direction, and the horizontal axis is the Y direction in order from the top view showing the translational acceleration, rotational acceleration, and temperature on the machining path, the vertical axis is the X direction, and the horizontal axis is the Z direction. A front view showing translational acceleration, rotational acceleration, and temperature on the machining path, and a side view showing translational acceleration, rotational acceleration, and temperature on the machining path with the vertical axis in the Y direction and the horizontal axis in the Z direction are shown. Switch tab 5 (timeChart, ACCX, ACC-R, Temperature) to display the time chart (see Fig. 2(a)), translational acceleration, rotational acceleration, and temperature. Further, the lookup table 4 (see the lookup table 4 in FIG. 2B) plotted as the measured values of acceleration and temperature on the machining path is shown in the lower stage. In Fig. 3(a), it is visualized by mapping that the acceleration is large especially in the contours and corners in the machining path of the star-shaped ball end mill machining, and "vibration", and in turn, deterioration of machining accuracy and tool It can be seen that the damage sign and its location are revealed in real time.

Although not shown in FIG. 3, the time chart shown in FIG. 2(a) is displayed as shown in the time chart at the right end of the tab 5, and the temporal changes in translational acceleration, rotational acceleration, and temperature are displayed on the same time axis. It can also be displayed.

≪Real-time display of the amount of change in processing tool≫
Next, a specific processing flow example in the present real-time processing state display device will be described.
FIG. 4 shows an example of processing flow example 1 in which the temperature, acceleration, and force are monitored for changes in each processing of the processing tool 1 such as a ball end mill, and changes in the state of the blade (cutting blade, etc.) 1a are displayed. ing. When the machining of the machine tool starts and the processing of the real-time machining state display device starts (ST1), the measuring means arranged in the tool holder of the machine tool measures the temperature, acceleration, force (stress) of the blade 1a in real time. Read (ST2). Specifically, from temperature data detected from a thermocouple or the like provided inside the tip of the blade 1a, acceleration data (translational acceleration or rotational acceleration) detected from an acceleration sensor arranged in a tool holder, strain gauges, or the like. Read the detected stress data.

When the temperature data/acceleration data/stress data of the processing tool 2 is read (ST2), the initial state of the blade 1a (at the start of processing) is detected, or the previous processing stored in the real-time processing state display device is performed. The state of time and the amount of change of the blade 1a this time are calculated (ST3). Although not shown in FIG. 4, at this time, it is determined whether or not the blade 1a is suitable for processing based on the initial state of the blade 1a and the amount of change from the previous processing (based on a predetermined threshold value set in advance), and is inappropriate. If it is determined that it is determined, a warning can be given or processing can be stopped. When the processing is started, the amount of change in temperature, acceleration, and stress of the cutting tool 1a during processing which is read is displayed (ST4). Then, when the measurement of the variation amount is completed, the process is completed (ST5 to ST6).

≪Display of machining tool and machine tool measurement data on the same time axis≫
FIG. 5 shows a processing flow example 2 in which data of a servo motor, an acceleration pickup, a dynamometer, a displacement meter, etc. are synchronously collected and plotted together with the temperature of the blade and the acceleration/force of the holder. In some cases, the machine tool and its peripheral equipment may be able to read measurement data other than the temperature, acceleration, and stress read in the processing flow example 1. For example, a servo motor for driving the machining tool 1, an acceleration pickup (vibration pickup) as a sensor that detects vibration and converts it into an electric signal, a dynamometer that measures power such as rotational torque from input/output data of a machine tool, It is a displacement meter or the like that measures the amount of movement of the blade 1a and the spindle. The auxiliary use of these measurement data can improve the accuracy of abnormality detection of the processing tool 1.

Specifically, when the processing is started in the same manner as in the processing flow example 1 (ST1), the temperature, acceleration, and force (stress) of the blade 1a are read in real time (ST2). When the temperature data, the acceleration data, and the stress data of the processing tool 2 are read (ST2), the data from the servo motor, the acceleration pickup, the dynamometer, and the displacement meter are read (ST7). Type chart (tab 5 (Fig. 2(b)) of the temperature/acceleration/stress data and the time-dependent change of each value of the data from the servo motor, accelerometer, dynamometer, and displacement meter on the same time axis. (See Time Chart)) in real time (ST8). Then, when the measurement of the variation amount is completed, the process is completed (ST5 to ST6). According to the processing flow example 2, in addition to the measurement data of the temperature, acceleration, and stress of the processing tool 2, the measurement data of the machine tool such as the servo motor, the acceleration pickup, the dynamometer, and the displacement meter are displayed on the same time axis (see Fig. 2 ( a) and the left end (time chart) of tab 5 in FIG. 3)) are displayed in real time, the accuracy of machining abnormality detection can be further improved.

≪Visual real-time display of abnormality occurrence≫
FIG. 6 shows a processing flow example 3 in which the temperature, acceleration, and stress of the cutting tool 1a of the processing tool 1 are mapped and visualized. According to this processing flow example 3, it is possible to visually convey to an operator such as a beginner engineer a portion where an abnormality such as overheating and chatter is likely to occur or a portion where the abnormality actually occurs.

Specifically, when the processing is started in the same manner as in the processing flow examples 1 and 2 (ST1), the temperature, acceleration, and force (stress) of the blade 1a are read in real time (ST2). The read temperature/acceleration/stress data is converted into a predetermined color according to each value. Although not shown in FIG. 6, it is preferable that the colors set according to the respective values of temperature, acceleration, and stress are displayed on the lookup table 4 or the like as shown in FIGS. Next, it communicates with the NC program of the machine tool to read the position coordinates (X, Y, Z coordinates) of the current machining point in the machining tool 1 from the CNC variables (ST10). Furthermore, the color set in ST9 in each measurement value of temperature, acceleration, and stress is in the coordinate plane on the display corresponding to the position coordinates of the processing point read in ST10 (see

windows

6, 7, and 8 in FIG. 3). ) Or a pixel (voxel) in the coordinate space (XYZ coordinate space) of the three-dimensional window, and is mapped in real time over the entire area being processed (ST11). Then, when the measurement of the amount of change is completed, the processing ends (ST5 to ST6). According to this processing flow example 3, the frequency of defective products of the processing tool 1 is reduced, the processing dimension accuracy of the workpiece 2 is improved, the quality of the processing surface is improved, the work efficiency is improved, and the sense of the expert is quantitatively determined. Understanding and acquisition, even experts can gain new knowledge.

<<Quantitative evaluation of changes/deterioration/abnormality of equipment/parts over time>>
As a processing flow example 4 in FIG. 7, as a fixed point observation of the state of the machine tool, temperature, acceleration, force, and position information for machining with a preset locus (machining path) using a tool 1a for evaluation and a tool holder. Is periodically obtained and the results are compared, and an example of quantitatively evaluating changes over time, deterioration, abnormality of machine tools and parts is shown. According to this processing flow example 4, since the machine tool/part can be visually compared and evaluated with the processing state up to that time when the same product is repeatedly processed, the frequency of defective products is reduced, the dimensional accuracy is improved, and the processing is improved. The quality of the surface can be improved.

FIG. 7A shows an example of a processing flow for creating temperature data, acceleration data, and stress data (including updating) on the machining path of the reference tool 1a and the machine tool (and its tool holder) to create reference data. ing. Further, FIG. 7(b) compares the temperature/acceleration/stress/coordinate data on each machining path after a predetermined period of the same machine tool with the reference data saved/created in (a), and is visible. The example of the process flow to be displayed is shown.

Specifically, in FIG. 7A, when the processing is started in the same manner as in the processing flow examples 1 to 3 (ST1), the temperature, acceleration, and force (stress) of the blade 1a are read in real time (ST2). Regarding the read measurement data of temperature, acceleration, and stress, the position coordinates (XYZ coordinates) of the current machining point are read from the CNC of the machine tool (ST10). The temperature, acceleration, and stress measurement data read from ST2 and ST10 and the position coordinate data of the corresponding machining point are saved, and if the machining tool is replaced or the machine tool is activated, the reference data is used as the initial time. Are created (ST12). The reference data is stored in, for example, a dedicated server or a cloud server, the reference data is stored, and the process ends when the measurement ends (ST5 to ST6). In addition, after the reference data is created, the data is sequentially and periodically saved every time the process of FIG. 7A is performed, and the data is saved as comparison data. It is also possible to use the comparison data stored so far as the reference data for the previous measurement and set the current data as the comparison data.

Next, in FIG. 7B, when the process is started in the same manner as in (a) (ST1), the reference data at the initial point saved and created in (a) is read and set (ST13). Similarly, the comparatively stored/created comparison data is read/set (ST14). Next, the reference data set in ST13 to ST14 is compared with the comparison data to calculate the difference in temperature, acceleration, and stress at each coordinate position (ST15). Then, the calculated temperature/acceleration/stress difference at each coordinate position is represented by a pixel in the coordinate plane on the display corresponding to the position coordinate of the processing point or the coordinate space of the three-dimensional window as shown in ST11 of FIG. It is displayed in the pixel inside (ST16), and when the display is completed, the process is completed (ST6). According to this processing flow example 4, it is possible to quantitatively evaluate changes over time, deterioration, abnormalities, etc. of the processing tool, the machine tool, and the parts thereof, reduce the frequency of defective products, improve the processing dimension accuracy, and process the workpiece. It is possible to improve the quality of the processed surface of the product.

1... Machining tool 2... Workpiece 3... Acceleration display 4... Lookup table 5... Tabs 6-8... Window

Claims

A real-time machining status display device for mapping the status on the machining path of a machining tool at the tip of a machine tool,
Measuring means for chronologically monitoring one or more physical quantity data of at least the temperature, acceleration or stress of the processing tool,
Position acquisition means for reading the time series coordinates of the working tool from the time information and position information of the operation control means (CNC) of the machine tool,
Based on the time-series physical quantity data from the measuring means and the time-series coordinate data from the position acquisition means, the physical quantity data at the coordinates on the processing path are converted into visualization data and displayed at the position on the processing path. And a real-time machining status display device including:
2. The mapping unit converts the physical quantity data into a color designation value set in advance corresponding to a predetermined numerical value of the physical quantity data, and displays the color designation value on a pixel corresponding to coordinate data. Real-time machining status display device.
The measuring unit has a thermocouple inserted in the processing tool, and a temperature measuring unit that outputs information from the thermocouple as temperature data,
The time-series coordinate data from the position acquisition unit is three-dimensional XYZ direction coordinate data, and the mapping unit displays temperature data in the XY plane, the XZ plane, and the YZ plane based on the coordinate data. The real-time processing state display device according to claim 1 or 2.
The measuring means includes an acceleration sensor arranged in a machine tool or a tool holder gripped by the machine tool, and an acceleration measuring unit that outputs information from the acceleration sensor as acceleration data,
The time-series coordinate data from the position acquisition unit is three-dimensional XYZ direction coordinate data, and the mapping unit displays temperature data in the XY plane, the XZ plane, and the YZ plane based on the coordinate data. The real-time processing state display device according to claim 1 or 2.
The machine tool is a rotary tool that rotates the machining tool to machine a workpiece, and the acceleration sensors are arranged on a horizontal plane in the tool holder at positions symmetrical in the radial direction with respect to the center of the rotation axis of the rotary tool. 5. The real-time machining state display device according to claim 4, wherein the real-time machining state display device includes a pair of acceleration sensors and a pair of acceleration sensors arranged at positions different in phase from each other by approximately 90 degrees.
The mapping means displays temperature data or acceleration data in the XY plane in an XY plane display window, displays temperature data or acceleration data in the XZ plane in an XZ plane display window, and temperature data or acceleration data in the YZ plane. Is displayed in the YZ plane display window, and a preset color designation value corresponding to each numerical value of the temperature data or the acceleration data is displayed in the color conversion table window. Real-time machining status display device.
A real-time machining status display device for mapping the status on the machining path of a machining tool at the tip of a machine tool,
Measuring means for time-sequentially monitoring the machine tool measurement data from one or more physical quantity data of the machining tool temperature, acceleration or stress and the measuring means provided in the machine tool for measuring the operating state of the machine tool,
A real-time machining state display device for displaying the time-series physical quantity data from the measuring means and the measurement data from the machine tool, or a temporal change of both data, on the same time axis.
A real-time machining status display device for displaying a status change on a machining path of a machining tool at the tip of a machine tool,
Measure and save one or more physical quantity data of the temperature, acceleration or stress of the processing tool at the reference time, and use the time information and position information of the operation control means of the machine tool to calculate the time series coordinates of the operating tool. Reference data creating means for creating the read reference data,
The physical quantity data measured/saved by the reference data creation means at the time when a predetermined time has elapsed from the reference time is measured/saved, and the time series coordinates of the working tool in operation are calculated from the time information and position information of the operation control means of the machine tool. A comparison data creating means for creating the comparison data read by
Comparison calculation means for calculating the difference between the physical quantity data at the time-series coordinates of the processing tool read from the reference data creation means and the comparison data creation means,
A real-time machining state display device comprising: a display unit that displays the difference between the physical quantity data calculated by the comparison and calculation unit at the coordinates on the machining path based on the time-series coordinates of the machining tool.